The unclued Across lights (including a pair) are of a kind and the unclued Down lights can be preceded by another (associated) word.

Across

1 To obtain acknowledgement, order direct (6)

13 Love making fuss about … (5)

15 … drink in The Wheatsheaf in encampment (5,4)

21 Coolness of pal stoned by wild mob (6)

22 Put up elsewhere, Spooner’s man phoned (2-4)

26 Perform some chorus in Gerontius? (4)

27 Noise from Paddington (3)

28 Article of faith explained (3)

29 Drop live commercial (4)

32 A French pair separate (8)

34 Petrol rating at once refined...